But the battery has not been ruled out as the cause of the fire. It continues to be the main focus of the Transport Safety Board's investigation with the National Transportation Safety Board and Federal Aviation Administration.

Officials have already conducted a CT scan in Japan and plan to disassemble the burned battery so they can analyze it piece by piece.

Meanwhile, the probe into the Japan Airlines Dreamliner that leaked fuel earlier this month has now shifted to the U.K., where Japanese inspectors are investigating the company that manufactures the valve actuator.

Boeing(EVERETT, Wash.) -- After a three-year delay, the Boeing 787 Dreamliner will finally be delivered to its first customer, All Nippon Airways.

The $200 million aircraft was scheduled to be handed over to the Japanese carrier in 2008, but it has been plagued by persistent delays that have cost Boeing billions of dollars since the company first announced the project in 2004.

Regardless of the long wait, the new Dreamliner is a welcome sight for struggling airlines since its light carbon fiber design promises to drastically reduce fuel usage.

The 787 will leave Everett, Washington for Japan on Tuesday. ANA will officially begin flying the aircraft domestically on Oct. 26.